A $328 million cryptocurrency investment scheme has collapsed following the arrest of its founder in Florida. Authorities allege the operation functioned as a large-scale Ponzi scheme, promising investors high, guaranteed returns through crypto trading activities that never existed. Prosecutors say funds from new participants were used to pay earlier investors while millions were diverted for personal use. The arrest marks a major step in an ongoing federal investigation, with officials seeking asset recovery and warning the public about rising crypto-related fraud schemes.